Mine is a 2004 also
It now has 68000 miles.
I have had it for 6 months and have put 3000 miles on it.
My only problem so far id the rain sensor on the front windshield, just behind the rear-view mirror. I have to remount it.
2004 LS430U got it just a few weeks ago with 46,300. Put ~600 miles on it since. Only problem was the bad sensor related to previous owner. Just replaced the AC filter today (yuck!) but other than that the car is PERFECT. Love it.
Other than a bad air suspension strut in right rear and tilt wheel making noise, both were replaced under warranty, it has been a great car. The bad strut, or whatever they call the air bag unit, made the car ride rough (actually installed chrome 16" wheels to soften the ride). This strut would also allow the car to settle an inch or two after a few weeks of non-use. Once replaced, the car rode very well.
Purchased with 58,000 miles 2 years ago. Problems so far 1) Steering column grinding(Replaced) 2) Outside Driver Mirror quit folding (Replaced) 3) Rain Sensor lost it mind and started Wiping at all times(Replaced) 4)Air Suspension struts failed(Replaced) 5) Headlight controller and HID Bulb Blew(Replaced). Glad I got that Extended Warranty!
2004 Ultra, 38,000 miles I've put on 1500 miles is the last 1.5 months since I bought it. I figure that I will average about 1000 miles/month so this will be a perfect car for my 3 year old when he turns 16.
Too bad I have not shown him and his little brother all the Ultra buttons on the backseat armrest or they would be covered in peanut butter. The side window shades keep them busy the few times that I end up taking them in my car.